Electricity and Magnetism Answers

Suppose the direction of current passing through two straight wires is same.would the wires attract or repel eachother?

The parallel plates of an air capacitor are seperated by 2.25 mm. Each plate carries a charge of 6.5 nC. The magnitude of the electric field of the plates is 4.75x10⁵ V/m. Find the a) potential difference between the plates, b) capacitance, and c) area of a plate.

A source told me that there’s types of spectrum which is line and continuous and types of line spectrum is emission spectrum and absorption spectrum and another source told me that types of spectra emission spectrum From it’s types continuous and line spectrum while absorption spectrum has two types line absorption spectrum and Fraunhofer lines , i need ANS PLZ

Metallic iron contains approximately 10^(29) atoms per cubic meter.The magnetic moment of each iron atom is 1.8×10^(-23) Am(-1).If all the dipoles were perfectly aligned what would be the magnetisation M and the magnetic moment of a bar 10 cm long and 1 cm^(2) in cross-section?

Write the plane wave form for the z-component of the electric field vector of an electromagnetic wave of wavelength 10 cm and field strength 200 Vm^(-1).The wave is propagating in the positive x-direction

A rectangular loop of wire that can rotate about an axis through its center is placed between the poles of a magnet in a magnetic field with a strength of 0.357 T (with the magnetic field parallel to the plane of the loop). The length of the loop L is 15.5 cm and its width w is 10.0 cm. What emf is developed in the loop if the loop is rotated form this position, in 1.00 ms, to a position where the plane of the loop makes an angle of 54.5 degrees with the magnetic field.

Four particles carrying charges +2q,-2q,+4q and -4q (with q=1.0 nC) are kept at the vectors of a square of side 6.0 cm.Determine the net electric field due to these charged particles at the centre of square.What is the electrostatic force on a particle carrying positive charge of 1.0 nC placed at the centre of square? Please explain in detail.

A uniform plane wave of 10 kHz travelling in free space strikes a large block of a material having ε=9ε_0,μ=4μ_0 and σ=0 normal to the surface.If the incident magnetic field vector is given by B→=10^(-3) sin(ωt-βy)k^ tesla
Write the complete expression for the incident,reflected and transmitted field vectors.

Four particles carrying charges + 2q, − 2q, + 4q and − 4q (with q = 1.0 nC) are kept at
the vertices of a square of side 6.0 cm. Determine the net electric field due to these
charged particles at the centre of the square. What is the electrostatic force on a
particle carrying positive charge of 1.0 nC placed at the centre of the square?

An alpha particle of charge 3.2×10^-19C and mass of 6.7×10^-27kg is fired into a uniform magnetic field of magnetic 0.24T north with a velocity of 8×10^6 ms^-1 to the east. Calculate:

a) The force on the alpha particle
b) The diameter of the subsequent circular motion.